The other day I’ve been using photo editing application and noticed that my laptop was struggling. Quick view in Task manager revealed that I running out of memory but the interesting thing was that total amount of physical memory was less then I expected. So next I popped up Resource Monitor and clicked onto Memory tab. This revealed that 561MB was Hardware Reserved.

The last thing to check was Basic system information in computer properties. In there it said:
Installed memory (RAM): 4.00 GB (3.45 GB usable)

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